Radiator arrangement



Dec. 14, 1943. F. H. BREHOB 2,336,840

RADIATOR ARRANGEMENT Filed July 4, 1942 Inventor: Frederick H. Brehob,

' His Attor wey.

Patented Dec. 14, 1943 RADIATOR ARRANGEMENT Frederick H. Brehob, Erie, Pa., assignor to General Electric Company, a corporation of New I .-York Application July 4, 1942, Serial No. 449,735

4 Claims.

The present invention relates to radiator arrangements including at least two radiators or surface type heat exchangers for cooling or term perature conditioning-two different fluids as are used for example on Diesel locomotives in which nism for independently controlling the flow of cooling air through the radiators bya singlefan means or blower.

For a consideration of what'I believe to be noyel and my invention, attentionis directed to the following description and the claims appended thereto in connection with the accompanying drawing. X

The single figure of the drawing illustrates a radiator arrangement embodying my invention.

In the example illustrated in the drawing the radiator arrangement forms part of a Diesel locomotive for cooling water and oil or like operating medium for Diesel engines.

The arrangement comprises a cab H) which may form part of the Diesel locomotive having v a bottom II, a top l2 and side Walls forming openings l3. A pluralityof radiators or surface type heat exchangers are arranged on the cab to receive cooling air conducted'through the openings l3. In the present example I have shown a radiator M on the lefthand side of the cab including a plurality of vertically arranged, finned tubes l5 having upper ends connected to an inlet header It for receiving water to becooled, and lower ends connected to an outlet header I! for discharging cooled water. On the righthand side of the cab three other radiators are provided. A radiator I8 for cooling oil is located in the upper portion and includes a plurality of vertical cooling tubes I 9 with upper ends connected to an inlet header for receiving oil to be cooled and lower ends connected to discharge cooled oil into a lower header 2!. A third radiator 22 is located in the lower portion of the righthand side of the cab. This radiator consists of two sections, an outer section with a plurality of tubes 23 with upper ends connected to an upper header or header se ction 24 for receiving oil to be cooled and connected at their lower ends to' a lower header or header section 25 for discharging cooled oil. The radiator 22 has an inner section with vertical tubes 26 connected to an upper header 2! for receiving water to be cooled and to a lower header or header section 28 for discharging'cooled water.

- Thus, the arrangement as a whole includes two water-cooling radiators and two oil-cooling radiators. One of the water-cooling radiators and one of the oil-cooling radiators are combined with their air passages connected in series as regards the flow of cooling air therethrough.

A plurality or separate louvers are provided to control the flow of air through'the, passages of the radiator. These louvers include a first louver 29 associated with the radiator l4, a second louver '30 associated with the radiator l8 and a third louver or louver arrangement 3! associated with the third radiator 22,- According tomy invention, means are provided for automatically actuating the louvers in response to predetermined temperature conditions of the cooled mediums and other means including a fan are provided for forcing cooling medium, in the present instance air, across the radiators upon the temperature of the discharged cooled medium reaching a predetermined high value. I

Referring more specifically to the drawing, the

louver 29 may be opened or closed by means of an air-operated servomotor 32 having a cylinder.

33 witha piston 34 slidably disposed therein and secured to a stem 35 which at its lefthand end is linked to the'louver 29. The piston 34 is biased towards the right, that is, into closed position of the louver by means of a spring 36. The righthand end of the cylinder 33 is connected to a source of operating medium, in the present instance a source of compressed air 3i, by means of aqccnduit 38 and a conduit 39 including a 'known type ofsolenoid-operated valve 30. The

solenoid-operated valve 40 has an electric circuit connected to an electric source 4| through a temperature-responsive device 42 including a bellows 43 with'a'contact-making member 44 biased by an adjustable spring 45. The bellows is connected to a pipe 46 which has a closed end portion in heat-exchange relationship with a conduit 41 connected to the water outlet header ll of the radiator l5 and the sectional outlet header 28 of the radiator 22.

During operation, upon rise in temperature of the water discharged through the'conduit 4'! to a predetermined value, the temperature-respon- ,spectively are set. V I i As described above, as the temperature of the.

.sive device 42 causesclosing or the circuit for the solenoid-operated valve 40 whereby the valve member is moved into itslefthahd end position and air is s pplied from the source 31 through {conduits 39, 38, to theservomotor 32, thus caus-.

ing the piston 34 of the latter to move into its lefthand end-position to' open the louver '29.

Simultaneously with the opening-oi the louver 29 the louver 3lispo'pened. The'latterfis actuated by a servomotor 48 corresponding to the servomotor 32 and connectedv to receive air from the ing of the circuit of the,solenoid-operated valve to admit air under pressure to the servomotors 32 and- 48. This causes-opening of the louvers '29 and 3| to admit cooling air to the passages of theyradiators I5 and, 22 respectively. If this flow of air is not suflicient to effect the desired reduction in temperature of the water and if .the temperature of the water rises further, the

. water temperature-responsive device 65 causes conduit 39 through a conduit 49 includihga shuttle valve 50. The latter in the present exconnected to a central portion of the cy1inder5l; Thersupply of air under pressure throughthe conduit 39 intothe lefthand end'of the cylinder ample comprises a cylinder 5| and a piston 52 gmovably disposed therein. The conduit, is

5| forces-the piston 52 into its righthand end position, thus permitting the newer air under pressure'through iheconduit 49 intotheservomotor 48.

. j'lhe .louver is actuated by third servoclosing oi'the' circuit-offlthe operating coil 64 for. the contactor relay 63, resulting in closing of the circuit for the motor GI and operation of the fan 50. The fan 60 continues to operate until the water temperature has dropped to permit the device 551-to open the circuit for the motor 6|.

Similarly, as the temperature of the cooled coil .rises to a predetermined value, the device 56 closes the electric circuit for the solenoid-operated valve 55 to admit air under pressure to the servomotors 53 and 48 and to open the louvers 30 and 3|. If

rthe'reupon a further rise of .the oil temperature takes place, .the temperature-responsive device I closes the circuit .for the coil 53 to effect opermotor 53 similar :to the'servomotors32 and 48.

The motor 53 is connected to the source or air 31 by a conduit 54 including a solenoid-operated vice 56 similar to'the. device 42 and associated with a conduit5'l connected to receive cooled oil discharged from-the lower headers 21 and 25 of theoi -coolin'g radiators. As the'temperature of the oil discharged tnroughthe conduit 51 reaches I a predetermined value'thedevice 56 closes the I electric circuit for the solenoid-operated valve valve55similar to the-valve 40., The. valve 55. has an electric circuitconn'ected tothe electric source. through a temperature-responsive de-- wnereby the latter reverses; its position to 7 permit the flow of air under pressure from the 1 source 31' through the conduit 54 to the servomotor 53; Simultaneously air through a'conduit 58 connected between the conduit 54 and the valve 50 to "the servomotor 48 to 'opentne louver 31.. In case the piston 52-vof the valve 50.is not in its lefthandend position the iorce of the air pressure tnrougn the con duit 58 forces the piston 52 in this position to establishconnection or the conduit. is with the;

source of air under pressure.

Thus, both louvers 3|),and I theoil temperature rises to a certain value and,

, vice-versa, the louvers are; closed as the oil temperaturedrops below such value. In case opening oi-the louvers does not suflice to pass sum cient'air through the "radiators; to bring the temperatures of the mediums "to be cooled to the desired value an additional draft is produced by; the provision of a single fan 60 drivenby' a poweragency. in the'present instance an electric motor 5i having an electric circuit connected to the source 4i by a contactor 62.; Thelatter is connected to a relay 53 with an operating coil 64. Thecircuit-ior theoperating coilis con- "nected to the source 4i and includes a temperature-responsive device- 55 associated with the V co'nduit4'lfor discharging cooled water and another temperature-responsive device .56 associated with the conduit 51 for discharging cooled en.- Each of the devices 65, 66 may close the circuitfo'r the coil 64 and the devices 65 and 66 are'set forQtemperatureshigher than the temperatures for which :the

devices 42 and56 re- 31 are opened when :the fan 50. lnjca se the radio isjallat f cuit closeduntil the oil'temperature has, dropped to the desired value. i T k v Ifbothmotors48 and,53 are connected to the source of air under pressure 31 and if thereupon the servomotor 32 is also connected to the-source ofair under pressure, the valve 50 remainsin the v 'position indicated because both sides of the piston 52 are subjectedto'the same pressure.

Thus, withmy invention I have accomplished radiators for temperature-conditioning several jdifierent fluids {in arrangement according to my invention is particularly efficient and economical when' .used'in connection with Diesel locomotives for coolingseveral operating mediums such as water and oil for Diesel engines.

. Having described the method of operation of my invention, together with the apparatus which I now consider. to represent the best embodiment thereof, I desire to have it understood that the apparatus shown is only illustrative and that the invention may be carried out by other means.

.What I claim asnew anddesire to secure by Letters-Patent ofthe United States is:

l. Radiator cooling arrangement for locomotivescomprising a cablhaving open side walls and -an open top, a-watercooling radiatorand a first louver arrangedalong one of the sidewalls, an

' oil cooling radiator and a second louver arranged along the opposite side wall, combined water and oil cooling radiators and a thirdlouver arranged along said opposite side walLmeansfor actuating the first and third louvers inresponse to predetermined temperature conditions of the cooled water discharged from the first and third radi ator, means includingtemperature responsive devices fortcontrollingthesecond and third louvers in response to certain temperature conditions of the cooled oil, and means including a single fan forinducing the flowof cooling medium through .one of the radiators in response to a certain temwater risesto a certainvalue the temperatureresponsive device 42is' actuated andcauses clos-' ready operating, the device 66 will keep the ciran improved construction and arrangement of third hydraulic motors for actuating the respective louvers. means including a first valve for controlling the fiowof operating fiuid to the first the first valve in response to a predetermined temperature of the cooled water discharged from the first and third radiators, means for operating the second valve in response to a predetermined temperature of the cooled oil discharged from the second and third radiators, and means including a single fan for inducing the flow of cooling air through any radiator when open and separate means responsive to the temperature of the cooled water and the cooled oil respectively discharged from the respective radiators for starting the fan. 3. Radiator cooling arrangement for locomotives comprising a cab having open side walls and an open top, a water cooling radiator and a first louver arranged along one of the side walls, an oil cooling radiator and a second louver arranged along the opposite side wall, combined water and oil cooling radiators and a third louver arranged along said opposite side wall, first, second and third hydraulic motors for actuating the respective louvers, means including a first valve for controlling the flow of operating fluid to the first and third motors, means including a second valve for controlling the flow of operating fluid to the second and third motors, means for actuating the first valve in response to a predetermined temperature of the cooled water discharged from the first and third radiators, means for operating the second valve in response to a predetermined temperature of the cooled oil discharged from the second and third radiators, and'means including a single fan for inducing the fiowoi cooling air through the open radiators and other separate means responsive to the temperature of the cooled water and the cooled oil respectively discharged from the radiators for starting the fan, said other temperature responsive means being set to operate at a a temperature above that of the first mentioned temperature responsive means to effect starting of the fan only subsequent to the opening of at least one of the louvers.

4. Radiator cooling arrangement for locomotives comprising a water cooling radiator, an oil cooling radiator, a combined water and oil cooling radiator, a first, a second, and a third louver for the Water cooling radiator, the oil cooling radiator, and the combined water and oil cooling radiator respectively, a first, a second, and a third hydraulic motor for operating the respective louvers, a conduit including a valve for conducting operating fluid to the first motor, another conduit inciuding a valve for conducting operating fiuid to the second motor, se'parate Y devices responsive to the temperature of the cooled water and the cooled oil respectively for operating the first and second valves respectively, and a conduit including a shuttle valve connecting the third motor to the first and second conduits behind the valves therein as regards the direction of flow of operating fluid therethrough automatically to'supply operating fluid to the third motor upon fiuid flow to one of the first and second motors.

FREDERICK H. BREHO BL 

